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What pressure required to kill steam radiator vents?

bruce_21
bruce_21 Member Posts: 241
in Strictly Steam
In the process of adjusting a client's steam system I noticed that while the pressuretrol was set at .5 with a dif of 1.0 the pressure guage was at 10psi and rising. I took the pressuretrol off and discovered the pigtail trap was clogged. Replaced both control and pigtail and system now operates at proper pressure. It must have been that way for a while. Have all the little expanding parts of the steam vents been crushed by that high pressure? Thanks in advance for any help and insight.

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 24,857
    Maybe so, maybe no

    if you are fortunate, no.  However... it would be well worth the time to wander around and find all of them and find out!
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    It depends on the vent.

    Some are as low as 10 psi but most are between 15 and 30 psi max. Some have lower operating pressures, but that just means they don't work properly at higher pressure.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24

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